25 years ago I made a deal with my employer. I had a 1 hour commute each way, we had a product deadline to meet. I traded work from home for a 9 hour work day (+1 hour from my total commute time). I worked from home, no kids, dedicated office and was much more productive and hit the deadline with time to spare. I never went back to the office - except for special occasions. I saved a bunch of money on car expenses (gas, maintenance, insurance) and got an hour of my life back
Fast-forward to 2024, my brother dies and I move to take care of his kids. 2-4 kids (depending on who is home) and one giant dog, dedicated workspace. The amount of time I spent working plummeted. Feeding and walking the dog, driving kids around, managing the household finances, maintaining the house, etc, etc. eats up a huge amount of time.
I did some of that stuff - maintaining a home, personal stuff - without eating into working hours when it was just me. When you add up to 5 living beings that you also have to manage there is simply not enough time in the day (and weekends are for naps, thank you).
However, I will say that it is finally nice to take advantage of that "oh you have a family" PTO where people can just disappear from work. Perhaps employers should take advantage of this and start hiring single-no-kids people, or even favor married-spouse-doesn't-work people - that would make sense to me if you want to increase productivity. That would suck for single-with-kids people, but you could stick them in roles that don't have big productivity impacts.